All Questions
90
questions
0
votes
1
answer
2k
views
Inductors: Saturation Current or Rated Current?
I am designing a 5V, 5A buck converter, and I am trying to spec my output inductor.
The datasheet specifically mentions that my inductor should have an appropriate current rating, but
I also wonder ...
- 161
0
votes
0
answers
141
views
Disadvantages of routing inductor in Buck Converter on opposite layer?
I am routing a TPS562202S buck regulator, using a 4.7 uH inductor. Due to space and assembly constraints, I cannot place the inductor on the same layer as the regulator. The regulator will be on the ...
- 325
1
vote
1
answer
169
views
Bulk capacitance equation derivation from appnote
I am looking at SLTA055 by Texas Instruments. It discusses, among other items, how to determine the bulk capacitance required for a buck regulator if a LC filter is used. Since the "L" will ...
- 736
6
votes
1
answer
856
views
What are the issues with using multiple inductors for a DC/DC converter?
I'm going to be designing a Buck Converter that will supply a max of 10A of current to an LED Strip (9V to 20V in, 5V out). Since I want to minimize the amount of EMI in the circuit, I want to use ...
- 1,195
0
votes
0
answers
184
views
Glitches in inductor current waveform
I am using this DC-DC buck converter.
Schematics :
Buck converter specifications :
Input voltage - 18V to 32V
Switching frequency - 300kHz
Output voltage 9V
Load current - 0mA to 200mA maximum.
...
user220456
0
votes
3
answers
450
views
Buck converter without inductor in a NiMH charger (Zilog AN0259 application note)
After doing some reading online, it seems that you can't really build a step-down converter with only a filtering capacitor and without an inductor, because the losses occuring during charging of the ...
- 13
5
votes
2
answers
1k
views
Where does the inductor energy go in a buck converter when the load is suddenly disconnected?
It is known that inductors resist a change in current. So, my question is that in a buck converter, what prevents the output voltage from going all the way up due to inductor resisting a current ...
- 109
1
vote
2
answers
193
views
Power inductor's staturation current for buck converter
Is it correct that when selecting an inductor for a buck converter I should be choosing an inductor with the saturation current higher than the converter's peak current?
How much of a margin should it ...
- 825
2
votes
2
answers
175
views
Buck Converter Capacitor and Inductor Characteristics
I'm trying to make a buck converter with this mickey-mouse MC34063A chip that will step-down +5V to +3V3 up to 500 milliamps. I've gone through the calculations by hand and validated them with an ...
- 187
1
vote
1
answer
836
views
In Buck Converter, when the ESR and EPR of Inductor increases then what is the its effect on output voltages and why?
I have done LTSpice simulation. I have seen that by increasing ESR of inductor, the output voltages decreases and by increasing EPR of inductor the output voltages and ripple in output current and ...
- 23
1
vote
1
answer
373
views
Placing multiple inductors (buck) close to each other on PCB
I have three buck converters on my PCB.
12V to 0.82V @ 25A -FP1308-R21-R, Fsw = 650 kHz, TPS548D21
12V to 1V @ 8A - IHLP2525CZERR47M01, Fsw = 1 MHz, TPS548A20
12V to 5V @ 3A - Inductor is XAL5030-...
- 1,398
2
votes
2
answers
1k
views
Buck inductor current ratings
we are designing a buck using MIC23350 to generate 1.8V @ 2A.
Input - 2.5 to 5.5V - typical is 3.3V or 5V.
Switching frequency- ~1100khz.
Nominal current is ~0.5A, Max current can be 30% higher.
...
- 1,398
1
vote
1
answer
561
views
Buck Converter - Inductor CCM and DCM
I have a doubt while selecting the inductor for a buck converter.
TI App Note
In This app note, in the abstract itself, they mention that this :
This application report gives the formulas to ...
user220456
2
votes
1
answer
267
views
LM2596T, Inductor selection
I'm trying to build a simple low voltage 0-12 adjustable PSU and the simplest way i could think of was using a LM2596T ADJ.
In page 16 of the Datasheet there's a inductor selection selection guide, ...
- 2,396
6
votes
3
answers
2k
views
Buck Converter dies unpredictably upon connecting power
I made a PCB for an ESP32-based solenoid controller that is powered by a 24V DC Jack. I'm using an AP63205 Buck Converter to step that input down to 5V DC, and then a linear 3V3 LDO to power the ESP32....
